Update from https://crrev.com/308331

net/socket/client_socket_pool_base.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/socket/client_socket_pool_base.h"
 
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/stats_counters.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 
 using base::TimeDelta;
 
 namespace net {
@@ skipping 836 matching lines @@
     *group = top_group;
     *group_name = *top_group_name;
   } else {
     CHECK(!has_stalled_group);
   }
   return has_stalled_group;
 }
 
 void ClientSocketPoolBaseHelper::OnConnectJobComplete(
     int result, ConnectJob* job) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436634 ClientSocketPoolBaseHelper::OnConnectJobComplete"));
+
   DCHECK_NE(ERR_IO_PENDING, result);
   const std::string group_name = job->group_name();
   GroupMap::iterator group_it = group_map_.find(group_name);
   CHECK(group_it != group_map_.end());
   Group* group = group_it->second;
 
   scoped_ptr<StreamSocket> socket = job->PassSocket();
 
   // Copies of these are needed because |job| may be deleted before they are
   // accessed.
@@ skipping 444 matching lines @@
   pending_requests_.Erase(pointer);
   // If there are no more requests, kill the backup timer.
   if (pending_requests_.empty())
     backup_job_timer_.Stop();
   return request.Pass();
 }
 
 }  // namespace internal
 
 }  // namespace net